[Simulation of teleangiectactic osteosarcoma by aneurysmatic bone cyst]

Aneurysmatic bone cysts are usually diagnosed by the combination of x-ray imaging and magnetic resonance imaging (MRI) with a sensitivity of 77.8% and specificity of 66.7%. We present an unusual case of an aneurysmatic bone cyst which initially mimicked an osteosarcoma on imaging and later developed the characteristic features of an aneurysmatic bone cyst which was confirmed by histology.